Usually referrd to any girl you can call at any time and get them to meet you at a creek nearby so you can bang her brains out or whatever you want from her and she will do it no matter what. Pretty much a rednecks prostitute that generally doesn't look that well and you keep her on tha down low but if she's a sexy creekdonk then you brag about tha creekdonk your bangin.

Dude 1"Sup bro what we doin taday?"
Dude 2"Ima call us up each a Ceekdonk and get them to meet us at Savage Creek and they gonna do whatever we please dude."
Dude 1"Hell yeah dude call them creekdonks they already know whatsup."